Solution : https://service.sap.com/sap/support/notes/30316 (SAP Service marketplace login required)
Summary :
When utilizing SAP R/3 to manage purchasing documents, issues may arise where certain fields are not enterable despite having the 'Optional entry' indicator correctly set within 'Screen layout, document level' customization (Transaction OLME/OMFx). This involves multiple purchasing-related transactions such as ME21, ME22, and ME23. Root causes include overlaid field selection keys due to a release strategy or misconfigured settings. Resolution entails verifying all field selection reference keys within the relevant customizing transactions (e.g., OMF2, OMF4) and debugging through SE37 using 'MEX_FELDAUSWAHL'. Field status hierarchy and breakpoint instructions are provided for effective troubleshooting.
Key words :
field status 'hidden' takes highest priority, field selection reference keys found, relevant field selection reference keys, field selection reference keys, field selection reference key, display function module mex_feldauswahl, field selection key, field contents show, routine 'field selection', function module 'mex_feldauswahl'
Related Notes :
| 986044 | normal access to ME27/ME28 but display in ME23N |
| 487950 | FAQ: Purchasing |
| 448814 | FAQ: Texts in purchasing |